Method used for improving performance of polyimide film via grafting with zwitter ions and silver, and product thereof
A technology of polyimide membrane and amphoteric ion, which is applied in the field of polyimide membrane modification, can solve the problems of easy adsorption and reproduction of bacteria, and is not an anti-pollution method, so as to facilitate industrial application, improve anti-biological pollution, and easy The effect of the operation
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[0054] Example 1
[0055] The method for improving the anti-pollution performance of the polyimide film in this embodiment includes the following steps:
[0056] S1 Add the silver ion solution to the solution containing amine groups and disperse uniformly for 60 minutes. The silver ion solution is silver nitrate. The concentration of silver ions in the silver nitrate solution is 0.005mol / L. The solution containing amine groups is polyethyleneimine solution. The concentration of the ethyleneimine solution is 0.3mol / L.
[0057] S2 will be modeled as The 4000T polyimide membrane (the raw material manufacturer is Solvay AdvancedPolymers) is immersed in the solution in S1 for 60 minutes. The polyimide membrane is a polyimide microfiltration membrane with a pore size of 0.01 μm to 1 m. The concentration of the polyimide film forming solution was 16%. After soaking, take it out and rinse with plenty of water.
[0058] S3 adds a reducing agent dropwise to the S2 solution, keeps it for 120 ...
Example Embodiment
[0063] Example 2
[0064] The method for improving the anti-pollution performance of the polyimide film in this embodiment includes the following steps:
[0065] S1 Add the silver ion solution to the solution containing amine groups and disperse uniformly for 70 minutes. The silver ion solution is silver nitrate. The concentration of silver ions in the silver nitrate solution is 0.001 mol / L. The solution containing amine groups is polyethyleneimine solution. The concentration of the ethyleneimine solution is 0.3mol / L.
[0066] S2 will be modeled as The 4000T polyimide membrane (the raw material manufacturer is Solvay AdvancedPolymers) is immersed in the solution in S1 for 70 minutes. The polyimide membrane is a polyimide microfiltration membrane with a pore size of 0.01 μm to 1 μm. The concentration of the polyimide film forming solution was 16%. After soaking, take it out and rinse with plenty of water.
[0067] S3 Add reducing agent dropwise to the S2 solution, keep it for 100 mi...
Example Embodiment
[0072] Example 3
[0073] The method for improving the anti-pollution performance of the polyimide film in this embodiment includes the following steps:
[0074] S1 Add the silver ion solution to the solution containing amine groups and disperse uniformly for 10 minutes. The silver ion solution is silver nitrate. The concentration of silver ions in the silver nitrate solution is 0.01 mol / L. The solution containing amine groups is a solution containing polyethyleneimine. , The concentration of polyethyleneimine is 0.1mol / L
[0075] S2 will be modeled as The 4000T polyimide membrane (the raw material manufacturer is Solvay AdvancedPolymers) is immersed in the solution in S1 for 10 minutes. The polyimide membrane is a polyimide ultrafiltration membrane with a pore size of 0.001 μm to 0.1 μm. The concentration of the film forming solution for the polyimide film was 12%. After soaking, take it out and rinse with plenty of water.
[0076] S3 adds a reducing agent dropwise to the S2 solut...
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